Research On Livestock Farming Scale Based On Land Bearing Capacity Of Nitrogen And Phosphorus In Yongzhou

Pollution and pollution of livestock breeding industry is a worldwide problem, and animal husbandry is an important industry in China, the development of aquaculture industry in the country at the same time, the problem of fecal pollution control can not be ignored. Livestock and poultry breeding can not blindly pursue scale, expand production, the carrying capacity of livestock and poultry on a certain area is limited. Beyond the carrying capacity of livestock and poultry breeding is bound to cause environmental pollution; there is no excess, it indicates that there is a need for the development of space. Therefore, the research on the carrying capacity of the Regional Livestock and poultry breeding is of great significance to the measurement of the rationality of the scale of the area of the livestock and poultry breeding and the development of space.This paper carried capacity Yongzhou livestock and poultry breed in hunan province as the research Gui content, combining livestock farming and land bearing capacity of nitrogen and phosphorus, livestock and poultry breeding industry development should be put forward correspond to land bearing capacity of nitrogen and phosphorus, and ultimately to the regional agricultural development, the pollutant treatment situation of livestock and poultry breeding space has carried on the calculation and analysis, the main conclusions are as follows:(1) The amount of poultry and animal feces produced various counties (districts), which mainly is 2150.47 t, which produce dung amount of 1095.55 t, accounting for 50.94% of the total. Urine volume production of 1054.93 t, accounting for 49.06 of the total. Pig feces total 1396.65 t, accounting for 64.95% of the total; Total 555.93 t and cow, accounting for 25.85% of the total; Dung to produce total of 120.27 t, accounting for 5.59% of the total; Poultry dung have total 77.62 t, accounting for 3.61 of the total.(2) Various counties (districts), which mainly nitrogen and phosphorus of animal manure to produce total of 17.45 t, the nitrogen content is 12.24 t, accounting for 70.13% of the total. Phosphorus content is 5.21 t, accounting for 29.87% of the total. The total nitrogen and phosphorus produced 10.58 t of live pigs, accounting for 60.64% of the total; The total nitrogen and phosphorus produced 3.89 t, accounting for 22.30% of the total; Total nitrogen and phosphorus produced 1.08 sheep, accounting for 6.20% of the total; Poultry total nitrogen and phosphorus produced 1.89t, accounting for 10.85% of the total.(3) Which in 2013 counties (districts) of land bearing capacity of nitrogen and phosphorus results as follows:which was the main livestock and poultry nitrogen bearing capacity is 55.77 t, n surplus bearing capacity of 43.53 t; Bearing capacity of 11.48 t, p remaining bearing capacity of 6.27 t. Which was the main livestock and poultry) (pigs, cattle, sheep and poultry dung nitrogen and phosphorus content were not beyond which the land bearing capacity of nitrogen and phosphorus, and there is a big breeding room to grow. Contrast which counties (area) the usage of land bearing capacity of nitrogen and phosphorus, only SAN tin county land bearing capacity limit exceeding, should properly control the release of the phosphorus in feces, solve the problem of sewage farms raise or control.(4) Which in 2013 counties (area) the main livestock and poultry breeding allow breeding. Specific results for:pig bearing capacity, which is 6.743141 million head, surplus bearing capacity of 1.627241 million head; 912697 head 912697 head of cattle capacity, residual bearing capacity; Sheep bearing capacity is 7.832272 million head, surplus bearing capacity of 7.233772 million head; 206.540965 million poultry capacity, the remaining bearing capacity of 206.540965 million. Which was the main livestock farming scale is not beyond the bearing capacity of soil nitrogen and phosphorus, can be the appropriate increase the size of the farming, animal husbandry development.